Lung Image Quality with 320-row Wide-volume CT Scans: The Effect of Prospective ECG-gating and Comparisons with 64-row Helical CT Scans

Yamashiro, Tsuneo; Miyara, Tetsuhiro; Takahashi, Masashi; Kikuyama, Ayano; Kamiya, Hisashi; Koyama, Hisanobu; Ohno, Yoshiharu; Moriya, Hideshige; Matsuki, Mitsuru; Tanaka, Yūko; Noma, Satoshi; Murayama, Sadayuki

doi:10.1016/j.acra.2011.12.001

Cited by 16 publications

(10 citation statements)

References 27 publications

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“…All patients were scanned on a 320-row MDCT scanner (Aquilion ONE ; Toshiba Medical Systems, Otawara, Tochigi, Japan) for both conventional static and dynamic-ventilatory scans. Using the wide volume mode (nonhelical mode), 16 dynamic scanning was performed at a fixed point without bed movement, resulting in a CT fluoroscopy of 160 mm in length. Scanning field of view (FOV) was selected from two settings based on patient’s body habitus: 320 (medium, n=11) or 400 mm (large, n=10).…”

Section: Methodsmentioning

confidence: 99%

Continuous quantitative measurement of the proximal airway dimensions and lung density on four-dimensional dynamic-ventilation CT in smokers

Yamashiro

Moriya

Tsubakimoto

et al. 2016

COPD

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PurposeFour-dimensional dynamic-ventilation computed tomography (CT) imaging demonstrates continuous movement of the airways and lungs, which cannot be depicted with conventional CT. We aimed to investigate continuous changes in lung density and airway dimensions and to assess the correlation with spirometric values in smokers.Materials and methodsThis retrospective study was approved by the Institutional Review Board, and informed consent was waived. Twenty-one smokers including six patients with COPD underwent four-dimensional dynamic-ventilation CT during free breathing (160 mm in length). The mean lung density (MLD) of the scanned lung and luminal areas (Ai) of fixed points in the trachea and the right proximal bronchi (main bronchus, upper bronchus, bronchus intermedius, and lower bronchus) were continuously measured. Concordance between the time curve of the MLD and that of the airway Ai values was expressed by cross-correlation coefficients. The associations between these quantitative measurements and the forced expiratory volume in 1 second/forced vital capacity (FEV1/FVC) values were assessed by Spearman’s rank correlation analysis.ResultsOn the time curve for the MLD, the Δ-MLD1.05 values between the peak inspiratory frame to the later third frame (1.05 seconds later) were strongly correlated with the FEV1/FVC (ρ=0.76, P<0.0001). The cross-correlation coefficients between the airway Ai and MLD values were significantly correlated with the FEV1/FVC (ρ=−0.56 to −0.66, P<0.01), except for the right upper bronchus. This suggested that the synchrony between the airway and lung movement was lost in patients with severe airflow limitation.ConclusionRespiratory changes in the MLD and synchrony between the airway Ai and the MLD measured with dynamic-ventilation CT were correlated with patient’s spirometric values.

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Section: Methodsmentioning

confidence: 99%

Continuous quantitative measurement of the proximal airway dimensions and lung density on four-dimensional dynamic-ventilation CT in smokers

Yamashiro

Moriya

Tsubakimoto

et al. 2016

COPD

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“…Currently, limited data exist for noncardiac widearea detector CT. In the results of an early study of 320-detector row chest CT in adults, investigators demonstrated improved image quality in the lung parenchyma, compared with that for a 64-detector row helical acquisition (69). In the findings from a separate study of pediatric patients, investigators found that there was no difference in motion artifact with axial scanning mode for 320-detector row chest CT, compared with that for a 160-detector row helical acquisition on the same scanner, for small patients (<10 kg) (66).…”

Section: Wide-area Detector Ctmentioning

confidence: 99%

Advanced CT Techniques for Decreasing Radiation Dose, Reducing Sedation Requirements, and Optimizing Image Quality in Children

et al. 2019

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“…Meanwhile, CT machines have been developed, and in term of scanning techniques there are two representative techniques (16)(17)(18)(19)(20), one being helical scanning where the use of thinner detector collimation and a lower beam pitch can produce high image quality compared to that attainable with a thicker detector collimation and/or higher beam pitch (21). The other is wide volume scan (WVS).…”

Section: Introductionmentioning

confidence: 99%

Adaptive iterative dose reduction 3D (AIDR 3D) vs. filtered back projection: radiation dose reduction capabilities of wide volume and helical scanning techniques on area-detector CT in a chest phantom study

et al. 2015

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Lung Image Quality with 320-row Wide-volume CT Scans: The Effect of Prospective ECG-gating and Comparisons with 64-row Helical CT Scans

Cited by 16 publications

References 27 publications

Continuous quantitative measurement of the proximal airway dimensions and lung density on four-dimensional dynamic-ventilation CT in smokers

Continuous quantitative measurement of the proximal airway dimensions and lung density on four-dimensional dynamic-ventilation CT in smokers

Advanced CT Techniques for Decreasing Radiation Dose, Reducing Sedation Requirements, and Optimizing Image Quality in Children

Adaptive iterative dose reduction 3D (AIDR 3D) vs. filtered back projection: radiation dose reduction capabilities of wide volume and helical scanning techniques on area-detector CT in a chest phantom study

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